Adjustable platform or scaffold



(No Modl.) 01. w. GRUSON 8v J A. DOBKINS.

ADJUSTABLE PLATFORM OR SGAFFOLD. No. 533,056. Patented Jan. 29,1895.

I ZOE/(57w v mm NITED STATES PATENT" OFFICE.

GEORGE W. ORUSON AND JOHN A. DOBKINS, OF LEBANON, OREGON.

ADJUSTABLE PLATFORM OR SCAFFOLD.

' SPECIFICATION forming part of Letters Patent No. 533,056, datedJanuary 29, 1895.

Application filed October 9, l 894. Serial No. 525,418. (No model.)

To all whom it may concern;

Be it known that we, GEORGE W. ORUSON and JOHN A. DOBKINS, citizens ofthe United States, residing at Lebanon, in the county of Linn and Stateof Oregon, have inventedcertain new and useful Improvements inAdjustable Platforms or scaffolds; and We do hereby declare thefollowing to be a full, clear, and exact description of. the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

Our invention relates to improvements in adjustable platforms orscaffolds, the object of the same being to provide a device of thischaracter which is adapted foruse for pruning trees, picking fruit,papering and painting houses, and in fact for any purpose where theraising and lowering of a platform on which the operator stands, is adesideratum.

The invention consists in the construction of parts and arrangement ofinstrumentalities which will be hereinafter fully set forth and claimed.

In the drawings, which form a part of this specification, Figure 1 is aperspective view of the apparatus, set up and made for use. Fig. 2 is afront view of the upright hollow standard with its front side removedshowing the vertical stem therein, in elevation. Fig. 3 is a verticalcentral section through the same showing the arrangements of the cordand pulleys. Fig.4is a detail view of an extensible leg of the ladder.

Referring to the drawings by letterA represents a hollow post orstandard preferably made of wood, square in cross section, and havingthe opposite slots 0. in two of its sides, and lugs a, near the topthereof. This standard, in the adjusted position of the device, restsupon the ground and is supported and held vertical by means of the threelegs B. B. 13., and the short ladder O, removably connected to the lugsa at the upper part of the standard A, by means of pins passedtherethrough, as clearly shown in the drawings. The two opposite legs B.B. of the device are provided with means whereby they may be lengthenedor shortened to compensate for unevenness of the ground, or moreparticularly for the purpose of being able to support the device upon-vthe side of a hill. This means consists of a longitudinally slotted footpiece 13 adapted to be adjusted by means of a set screw 12' at differentpoints between the side bars of the legs B.

Fitting the hollow standard A and adapted 7 end of the groove (1 asclearly shown in Fig. 3.

F is a third pulley mounted in a bracket F which fits the groove d andthe bracket is adjustably secured to the standard A by a set-screworother means working in the slot at.

G represents a platform suitably secured to the stem D, upon which theworkman or operator stands and at the upper end of the stem D is mountedin suitable brackets, the

Windlass H provided with a suitable crank or handle I, and suitabledetent mechanism by which the same may be operated. Above this IWindlass H we provide a small cap or table J upon which may be placed apaint bucket, fruit basket, or any of the tools used by the operator.The cord d is attached at One'end to the bracket F',thence passes downaround the pulley E, up around the pulley F, down around the pulley E,and up to the Windlass H, when the'other end is secured.

It will be seen that by turning the crank I and winding up the cord (1on the Windlass H, the stem D carrying the platform G and the operator,will be elevated and the reverse operation will lower the same.

Our device is extremelysimple of construction, can be cheaply made, andis convenient in all its details. The short ladder C is used by theoperator in climbing up to the platform G. All the parts are easilydetachable, and can be folded up in a neat and compact form fortransportation.

We have described our invention in its preferred form, but it is evidentthat many minor changes may be made therein without departing fromthenature or spirit of the invention or sacrificing any of its advantages.

Having now described our invention, what we claim as new, and desire tosecure by Letters Patent, is

1. An adjustable platform or scafiold, consisting of the combination ofa hollow upright standard, supported and held in its vertical positionby three legs, and a short ladder all pivotally connected thereto, asolid stem carrying a platform adapted to move therein, a Windlass onsaid stem, and connections between said Windlass and said standard,whereby the platform may be raised and lowered at will, substantially asdescribed.

2. An adjustable platform or scaffold, con sisting of the combination ofa hollow upright standard having connected thereto a bracket carrying asheave, supported and held in its vertical position by extensible legsand a short ladder, all pivotally connected thereto, a solid stemcarrying a platform adapted to move in said hollow standard, and havinga longitudi-

